AN2929宽范围为90 V - 265 V，]输入5 V - 12 W输出的VIPER27LN提催待机性能演示板

AN2929宽范围为90 V - 265 V，]输入5 V - 12 W输出的VIPER27LN提催待机性能演示板

AN2929
Application note
Wide range [90 V - 265 V] input, 5 V - 12 W output VIPER27LN
demonstration board with improved standby performance

Introduction
In consumer applications such as LCD or plasma TVs, some models of DVD recorders, set-
top boxes with hard disk, as well as desktop computers, the power supply often includes two
modules: the main power supply that provides most of the power and is off when the
application is in standby mode and the auxiliary power supply that provides energy for
specific peripherals such as USB ports, remote rece